Clevis for regulating plow-furrows



- N0. 6|6,955. Patented Jan'. 3, I899.

J. H. NELSUN; CLEVIS FUR REGULATING FLOW. FURBOWS.

. (Application filed Mar. 15, 1898;)

(No Modem UNITED STATES PATENT OFFICE.-

JOHN H. NELSON, OF ATLANTIC, IOWA.

CLEVIS FOR REGULATING PLOW-FURROWS.

SPECIFICATION forming part of Letters Patent No. 616,955, dated January 3, 1899.

Application filed March 15, 1898. Serial No. 673,924. (No model.)

To aZZ whom it may concern.-

Be it known that I, JOHN H. NELSON, a citizen of the United States, residing at Atlantic, in the county of Cass and State of Iowa, have invented a new and useful Adjustable Plow- (Jlevis for Regulating the Depth and Width of Furrows, of which the following is a specification. A

My object is to provide improved means for regulating the depth of the furrow of a plow by the plowman while the plow is in motion and also improved means for adjustably connecting the clevis on a doubletree with the plow-beam as required to regulate the width of furrow.

My invention consists in a rigid frame or clevis member adapted to be pivotally connected with a plow-beam, a bar clevis vertically adjustable in thefront of the frame, a lever detachably connected with the rear por-' tion of one of the parallel parts of the frame, and means for operating the lever, as hereinafter set forth, pointed out in my claims, and illustrated in the accompanying drawings, in which- Figure 1 is a perspective of a complete plow, showing my attachment applied thereto. I Fig. 2 is a detail enlarged perspective of a portion of the attachment detached from the plowbeam.

In the construction and application of the device, as shown, the numeral designates a plow-beam, the forward end portion of which is faced on its sides by metallic plates 11 12, fixed thereto. A forked clevis member 13 embraces the sides of the forward end portion of the beam 10 and is pivotally connected with said beam by means of a bolt 14, traversing the arms of said clevis member, the metallic plates 11 12, and the beam. A flange 15 is formed on and extends outwardly from the left side of the clevis member 13, and a lever 16 is fulcrumed on the pin 14 and has its forward end or arm extended within the flange 15. The rear end or arm of the lever 16 is bolted to the forward end of a handle 17. The handle 17 extends rearwardly along the beam 10 to a point within easy reach of the I plow-handles attached to said beam and is provided with an angle-clip 18,extending outwardly therefrom and embracing a rack 19. The rack 19 is fixed at its lower end to the plow-beam 10, extends outwardly therefrom, and thence upwardly through the clip 18 of the handle 17, and the teeth or notches of said rack are on the rear edge thereof. A pawl 20 is mounted on the handle 17 and is provided with a stud extending'through a slot formed in and longitudinally of said handle, and a plate 21 on the inner end of said stud, whereby the pawl is held in sliding engagement with the handle. A bell-crank 22 is pivoted on the handle 17 and is connected by a rod 23 to the rear end of the pawl 20. A leaf-spring 24 is mounted on the handle 17 and engages beneath the bell-crank 22. The resilience of the leaf-spring 24 is exerted to hold the bell-crank away from the handle and retain the pawl 20 through the medium of the rod 23 in contact with one or another of the notches of the rack 19. The forward end of the clevis member 13 is bifurcated, and the arms thereof are of materially'greater dimension vertically than horizontally and are pierced by a plurality of perforations or pinseats 25. A pin 26 is mounted in a pair of the pin-seats in the forwardarms of the clevis member 13,and a bar-clevis 27 is hinged on said pin. The bar-clevis 27 is pierced by a plurality of pin seats or apertures 28,whereby attachment of a whiffietree clevis (not shown) may be made tosaid bar-clevis. whiffletree-clevis may be adjusted laterally of the longitudinal axis of the plow-beam by seating in one or another of the pin-seats 28, and may be adjusted vertically by seating the pin 26 in one or another of the pairs of pin-seats 25.

By the lateral adjustment of the whiffletreeclevis relative to the bar-clevis-the width of the member 13 the plow may be adjusted as.

to depth of furrow desired. A further and immediately-available adjustment to control the depth of the furrow is obtained by the The manual actuation and the oscillation of the lever 16 through the medium of the handle 17, actuated by the operator from his position adjacent to the plow-handles. In the oscillation of the lever 16 on the pin 14 the clevis member 13 is oscillated relative to the plowbeam, and in its oscillation said clevis member 13 carries the cievis 27 and whiffletreeclevis, thus governing the pitch or inclination of the plow-beam relative to the horizontal line of draft. locked in any given position Within the coinpass of the rack 19 by spring-pressed engagement of the pawl 20 with said rack, and at the same time is in position to be released immediately and as often as desired for further adjustment.

It is obvious that, by constructing a frame complete in one piece and adapted to be pivotally connected with the plow-beam, and

providing a series of coinciding bolt-holes in vertical lines in the parallel sides of the front ends of the frames, and detachably and adjustably connecting the bar-clevis 27 therewith, the frame, as an improved element in the combination, is advantageous in that the said clevis can be readily raised and lowered independent of the lever attached to the frame, and that by providing the rear end portions of the parallel frame with coinciding holes for a bolt and one of said endportions with a flange 15 the frame and lever 16 The handle 17 may be can'be jointly and advantageously connected with the plow-beam.

I I claim as my invention---- 1. A rigid frame consisting of two flat parallel side portions connected near their front ends by an integral web, coinciding perforations in the rear end portions of the frame and a flange on one" of said end portions, coinciding perforations in the front ends of said parallel sides and a bar-clevis vertically ad justable between the said perforated ends, as shown and described for the purposes stated.

2., The frame consisting of parallel sides rigidly connected near their front ends and provided With coinciding perforations in their rear portions, a flange on one of the parallel rear end portions and series of coinciding pin-holes at their front ends, a 'bar-clevis 27, vertically adjustable between the front ends of the parallel sides of the frame, alever detachably connected with the rear end portion of the frame having the said flange to extend rearward, and meansfor detachably fastening the lever at the rear portion ofthe plow-beam, all arranged and combined substantially as shown and described to operate in themanner set forth for the purposes stated.

J OI-IN H. NELSON.

Witnesses:

CHAS. LARSEN, O. HANGOD. 

